US3172404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual testing apparatus
Assignee: TECHNICAL MEASUREMENT CORP
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Filing: 1962-04-03
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Granted: 1965-03-09
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Expires: 1982-04-03
Abstract
No abstract record available.
Inventors
- 👤 Richard M Copenhaver
- 👤 Gilbert D Beinhocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:51
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/024; A61B5/00; A61B5/24; A61B5/316; A61B5/369; A61B5/377
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
APPARATUS FOR VISUAL TESTING OF A SUBJECT COMPRISING: A HEMISPHERICAL TARGET ELEMENT; MEANS FOR SUPPORTING SAID SUBJECT''S HEAD SUCH THAT ONE OF SAID SUBJECT''S EYES IS AT THE CENTER OF SAID HEMISPHERE; MEANS FOR PROVIDING IN A PREDETERMINED TIME SEQUENCE AN ILLUMINATED SPOT AT EACH OF A PLURALITY OF POSITIONS ON THE CONCAVE SURFACE OF SAID HEMISPHERE, EACH OF SAID PLURALITY OF POSITIONS BEING DISPLACED FROM THE POLE POINT OF SAID HEMISPHERE; SENSOR MEANS PROVIDING AS AN OUTPUT SIGNALS INDICATIVE OF VARIATIONS IN OCCIPITAL POTENTIAL OF SAID SUBJECT; AND MEANS FOR CORRELATING SAID SENSOR MEANS OUTPUT SIGNALS WITH SAID PREDETERMINED TIME SEQUENCE OF POSITIONING OF SAID ILLUMINATED SPOT.
Claim 2
Dependent Claim
108 words
APPARATUS FOR VISUAL TESTING OF A SUBJECT COMPRISING: A HEMISPHERICAL TARGET ELEMENT; MEANS FOR SUPPORTING SAID SUBJECT''S HEAD SUCH THAT ONE OF SAID SUBJECT''S EYES IS AT THE CENTER OF SAID HEMISPHERE; MEANS FOR PROVIDING IN A PREDETERMINED TIME SEQUENCE AN ILLUMINATED SPOT AT EACH OF A PLURALITY OF POSITIONS ON THE CONCAVE SURFACE OF SAID HEMISPHERE, EACH OF SAID PLURALITY OF POSITIONS BEING DISPLACED FROM THE POLE POINT OF SAID HEMISPHERE; SENSOR MEANS PROVIDING AS AN OUTPUT SIGNALS INDICATIVE OF VARIATIONS IN OCCIPITAL POTENTIAL OF SAID SUBJECT; AND MEANS FOR CORRELATING SAID SENSOR MEANS OUTPUT SIGNALS WITH SAID PREDETERMINED TIME SEQUENCE OF POSITIONING OF SAID ILLUMINATED SPOT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |